Lighting fixture



Aug. 3, 1948. P. H. IRMISCHER 2,446,230 I LIGHTING FIXTURE Filed July 24, 1946 2 Sheets-Sheet 1 Aug. 3, 1948. P. H. IRMISCHER LIGHTING FIXTURE Filed July 24, 1946 2 Sheets-Sheet 2 Patented Aug. 3, 1948 UNITED STA-res PATENT "OFFICE menrmc matron-n Paul H. Irmischer, Chicago, in.

Application. July 24, 1946, serial No. 685,991

This invention relates to certain new and useful improvements in a lighting fixture and has for its principal. object the provision of an improved construction of this character, which will be highly efficient in use and economical in manufacture.

More particularly the invention relates to the shade of. the lamp assembly. In this aspect of the invention, an object is to provide a lamp shade, comprising relatively fewparts and assembled in a manner such as requires no rivetin brazing, welding or the like. The lamp construction shown in the accompa'nying drawings is what is known as a fluorescent lamp, which includes the usual fluorescent tube and a pull chain switch. As my invention is hereafter described and claimed, it will be apparent that the hood construction may be used with other types of bulbs, the object being to provide a shade, the parts of which may be expeditiously assembled by one other than a skilled mechanic, without the use of complicated tools and without the necessity of employing screws, solder, welding or the like.

Other objects will appear hereinafter.

The invention consists in the novel combination and arrangement of parts to be hereinafter described and claimed.

The invention will be best understood by reference to the accompanying drawings showing the preferred form of construction, and in which:

Fig. 1 is a perspective view of a lamp construction showing my improved shade associated therewith;

Fig. 2 is a sectional detail view taken substantially on line 22 of Fig. 3;

Fig. 3 is a fragmentary vertical cross sectional view of an end portion of the lamp shade; and

Fig. 4 is a fragmentary perspective view of the lamp shade parts in exploded relation with respect to each other.

The several objects of my invention are accomplished by the preferred form of construction as shown in the accompanying drawings.

For the purpose of illustration and explanation, I have shown my improved lamp shade associated with a fluorescent tube ill of the standard construction and mounted within the shade II by means of suitable mounting brackets l2. These mounting brackets l2 and the lamp II), as well as the pull chain switch, the chains of the latter being shown at l3, constitute no part of the present invention and, as stated, are shown for the purpose of ilustration and explanation. My improved shade may be constructed for associa- 1 Claim. (01. 2.40;--110.)..

2. tion with lamps of -difierent types other than fluorescent tubes.

This shade H may be of any shape or form, particularly the end thereof, without departing from the spirit of my invention.

The shade ll includes a shield l4 formed from a "sheet of material bent to" provide an enclosure for the tube Ill with its opposite edge portions [5 spaced from each other to provide a light slot I6 of elongated formation.

Each end i! of the shield I4 is provided with a transversely extending groove l8, the edge portion Id of which provides a retaining flange 2H. The ends of the shield M are closed bycaps 2! having a form corresponding to the shape of the end portion ll of the shield 14 with which it is associated.

This cap 2| provides an end wall 22 having a perforation 23 through which the mounting bolt 24 of the bracket 12 is projected.

The cap 2| provides a lateral flange 25 adapted to snugly engage in the groove l8 and retained therein by the flange 20.

The shield I4 is formed of yieldable material so that when the flange 25 is mounted in the groove Hi, the flange 25 will have yieldable contact with the shield M.

The inner wall of the groove I8, as indicated at 26, is provided by a groove 21 formed in the shield I l in the reverse direction to the groove It. The longitudinal edge portions l5 of the shield M are turned inwardly upon the shield M to provide elongated flanges 21' which bear upon the ends 28 of the flange 25. A tie band is indicated at 29. This band 29 is formed of yield able material and is of a width substantial-1y equal to that of the groove 21. The end portions 30 of this tie band 29 are bent inwardly upon the flanges 21'.

From an inspection of Figures 2 and 4, it will be noted that the elongated flanges 21' are spaced from the adjacent wall portions 3| of the shield I 4 for reasons hereinafter set forth.

When the shade I! is completely assembled in the manner now to be described, there are attached to the mounting bolts 24 arms 32 formed as a part of brackets or hooks 33, which permit suspending or supporting the shade from a suitable support such as, for example, the head panel or stead of a bed. These hooks normally are arranged to divert from each other in a direction rearwardly of the shade so that when hooked upon an element of the bed, they will be yieldably urged toward each other to effect a bending upon 3 the bolts 24 whereby to frictionally hold the shade in an adjusted position.

To assemble the shade II, the parts at the inception of the assembly operation are related one to the other in the manner shown in the exploded view, Fig. 4. The first step in the assembly operation is to spring apart the edge portions 15 of the shield Hi to permit the insertion or positioning of the flange 25 in the groove l8 between the retaining walls 20 and 26. The operator next positions the tie band 29 in the groove 21' and turns the ends 30 upon the flanges 27'. The final step consists in pressing the end portions 34 of the flanges 21" upon the end portions 28 of the flange 25, upon the completion of which operation the cap 2| is mounted in fixed relation with respect to the shield I4 and this is accomplished simply by the use of common pliers or light instrument, which instrument is used to press the end portions 34- of the flanges 27' upon the ends of the flange 25.

When the shade is assembled in this manner, the supporting brackets 33 and fluorescent tube brackets 12 and tube I are then arranged intheir proper position with respect to the shade.

The tie band 29 essentially serves to ornament the opposite ends-oi the shade, and the same may be omitted ifdesired.

While I have illustrated and described the preferred form of construction for carrying my invention into efiect, this is capable of variation and modifications without departing from the spirit of the invention. I, therefore, do not wish to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modifications as come within the scope of the appended claim.

Having thus described my invention, what I claim as new and desire to protect by Letters Patent is:

A lighting fixture comprising a shade formed from a sheet of material bent to provide a transversely curved shield having opposite longitudinal edges'substantially' spaced apart'to provide a light slot'and having'said edge-portions turned inwardly to provide oppositely disposed flanges, said shield having a retaining groove formed in each of its end portions, and end caps having peripheral portions insertable in the shield within said grooves and with the peripheral portions of said caps arranged between the flanges and the shield, said flanges being pressed upon said peripheral portions of said caps to retain the peripheral portions of the caps within the grooves. 7

- PAUL H. IRMISCHER.

' REFER C S CITED The following references are of record in the file of this patent:

' UNITED STATES PATENTS Woodall Sept. 30, 1947 

